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What Is Unit Testing Explain It with Example?

Unit testing
is a confusing part of the software development process. Unit testinginvolves individually
testing unit of code separately to make sure that it works on its own, independent of the other units. Unit
testing is essentially a set of path, test performed to examine the several
different paths through the modules. Unit
testing is remarkably done by programmers with the help of Unit framework
(like J Unit, CPP Unit etc. depending up on the language source code is
written). Unit testing is usually an automated process and performed
within the programmers IDE.

Unit
testing is an action used to validate that separate units
of source code remains working properly. Example: - A function, method, Loop or
statement in program is working fine. It is executed by the Developer. In unit testing Individual functions or procedures are tested to make sure that they are
operating correctly and all components are tested individually.

Unit
testing is a strategy that utilizes the white-box method
and concentrates on testing individual programming units. These units are
sometimes specifying to as modules or atomic modules and they represent the
smallest programming entity.

Unit Testing Example

Example of Unit
testing is explain below

For example you are testing a function; whether loop or statement in a program is working
properly or not than this is called as unit
testing. A
beneficial example of a framework that allows automated unit testing is JUNIT (a unit testing framework for java). XUnit
[20] is a more general framework which supports other languages like C#, ASP,
C++, Delphi and Python to name a few.

Tests that are performed during
the unit testing are explained
below:

1) Module Interface
test: In module interface test, it is checked whether the information is
properly flowing in to the program unit (or module) and properly happen out of
it or not.

2) Local data
structures: These are tested to inquiry if the local data within the module is
stored properly or not.

3) Boundary conditions:
It is observed that much software often fails at boundary related conditions. That’s
why boundary related conditions are always tested to make safe that the program is properly
working at its boundary condition’s.

4) Independent paths:
All independent paths are tested to see that they are properly executing their
task and terminating at the end of the program.

5) Error handling paths:
These are tested to review if errors are handled properly by them or not.

Conclusion: At last we
conclude that Unit testing focuses
on the distinct modules of the product.